Can't get ANY answers!! maybe this forum? :-)

[mayNArd3k]

Ok I have an 02' Concorde 2.7.. Yea the one with all the bad history!! Although I'm happy with mine..Its been rebuilt and they're great with proper maint.. but I have an issue and ask for.. ANY ANSWERS PLEEEZ.. Eng. codes p0441, P0158, P0056 Imho I think they all stem from the same problem, just don't know where to start?? The car runs OK, except the air-flow seems to be all messed up!! Revs up and down, up and down.. At idle and especially at a constant hwy speed.. With A/C on or off.. Intensified by the fact of duel exhaust.. (You can hear normally quiet engine MUCH MORE!) The Tach does not move at all nor can you feel anything, but it almost sounds like its shifting from 3rd to 4th over n over, but I think you'd feel that and see it in the RPMs.. Codes say nvld, O2, etc. but any starting point would be GREATTT!! I was thinking of cleaning MAF, but not sure if I should!! Thanks in advance, to anyone who tries to HELP!! J

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[dcotter0579]

P0056 HO2S Heater Control Circuit (Bank 2 Sensor 2)

P0158 02 Sensor Circuit High Voltage (Bank 2 Sensor 2)

P0441 Evaporative Emission Control System Incorrect Purge Flow

The first two are probably related. Check the wiring for the driver's side downstream O2 sensor. These circuits are very sensitive to problems because they have to be able to monitor very small changes in voltage. If somebody spliced in a connector less than perfectly, a problem could arise.

The third item relates to the EVAP system and is a separate issue.